Rotary pump



ROTAR PUMP 2 Sheets-Sh 1 Filed July 15 [1921 H. O JACKSON ROTARY PUMPMay 15, 1923[ 1,455,252

Filed July 15 @1921 2 Sheets-Sheet 2 gvvuenfoz 5h. :0. amuma;

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ma /sq HENRY GER JACKSGN, @F DELBWER, CULORADQ, ASSIEGNOB, T0 NJQTEUNAL*UQBEPAJRTY, A CORPOBATIGN OF COLGRfiDO.

EGTARY implication filed m 15,

T0 aZZ whom it may concern."

Be it known that I, HENRY G. JAoKsoN, a citizen of the United States,residing at the city and county of Denver and State of Colorado, haveinvented certain new and useful Improvements in Rotary Pumps; and i dodeclare the following to be a full, clear, and exact description of theinvention. such as will enable others skilled in the 'art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the characters of reference markedthereon, which form a part of this specification.

My invention relates to the art of rotary pumps and has for its objectto produce a pump that shall be of exceedingly simple construction,eilicient in its operation, of neat, substantial design and which can becheaply manufactured.

I am aware that rotary pumps of various kinds have been made and soldand that some of them have been used with more or less success. Ibelieve, however. that the pump which I have invented, and which I amabout to describe in detail by reference to the accompanying drawing,has features that are new and which are of great importance.

In the drawings:

Fig. 1 shows a side elevation of my pump.

Fig. 2 shows a side elevation of Fig. 1 looking in the direction ofarrow 2.

Fig. 3 is a longitudinal section taken on line 3-3 Fig. 4. I

Fig. 4 is a cross section taken on lme lt-4e Fig. 3.

Fig. 5 is a section taken on line 5-5 Fi 3.

Fig. 6 is a longitudinal section similar to Fig. 3 but showing amodified form of rotor.

Fig. 7 is a side elevation of the rotor shown in Fig. 6.

Fig. 8 is an end elevation looking in the direction of arrows 8, 8 Fig.7.

Fig. 9 is a side elevation of one of the rollers and Fig. 10 is an endelevation thereof.

In the drawings the same reference characters represent the sameelements through out the several views.

My improved pump comprises a main body portion or cylinder lzprovidedwith outwardly extending flanges 2 for the reception of top bolts 3 bywhich the cylinder 1921. Serial W0. 284,377.

heads or ends 4- and 5 are secured thereto, cylinder 1 is provided witha transverse cylindrical chamber 6 into which open in-alre and exhaustports 7 and 8 respectively. In the drawings 1' have shown only oneintake and one exhaust port but it is obvious there may be as many ofeach as be necessary for the proper operation otthe size pump underconsideration.

desire to call special attention to the shape and location of the portsfor consider this to he an important feature of my present structure.Referring now to Figs. 3, 4- and 5. it will be noticed that intake port7 has its inception at the opening 9 and passes inwardly under thecylinder 1 oii'setting as it passes under the cylinder. as indicated bythe dotted lines in Fig. its the opening passes the center line itoffsets towards the middle of the cylinder. Exhaust port 8 is similar inall essential features to the intake port 7 which has just beendescribed but has its inception in opening 10 and as it passes under thecylinder it oilsets to the other side of the middle portion thus leavinga partition or web 11 betweenthe two openings at this point. Each one ofthe ports open into the piston chamber 6 near the lower middle portionthereof and extends upwardly to a point near the upper middle portion asplainly shown in'Figs. 3 and 6. It will be seen from the abovedescription that the main body portion 1 is entirely symmetrical withrespect to a plane passing vertically thru its center and with ahorizontal plane. This feature permits the pump to be reversed at willwithout reversing the body portion. a feature that will be de scribedmore in detail hereafter.

The cylinder heads or ends 4 and 5 are each provided with a bearing 12and 13 respectively, for the reception of the shaft 14: which isattached to the rotary piston member 15. The center line of the bearings12 and 13 is offset with respect to the center of the cylindricalpistonchamber 6 and is nearer the bottom than the top of said cham ber.

Rotary piston 15 is of such a diameter that it will almost come incontact with the lowermost part of the piston chamber: this will leave aspace between the top of the chamber and the top of the piston which issubstantially equal to twice the distance between the axis of the pistonand that oi the tit) till

cylinder. It was stated above that the piston almost came in contactwith the lowermost part of the piston chamber. In explanation of thestatement it is pointed out here that for the reason that sealingrollers, to which reference will be made later, are used, it is notnecessary that the piston should make contact with the piston chamherand therefore a space a few thousandths of an inch is left so as toavoid wear or fr1c tion.

The rotary piston is provided with four grooves or slots 16 which extendthe entire length of the piston. In Fig. 3 these slots arev shown asplaced entirely on the leading side of diameters spaced apart, but thisis not essential; they may be placed so that the diameters pass thru thecenter of the slots as indicated in Fig. 6.

Located in each of the slots 16 is a roller 17 which fits looselytherein, the length of the roller being such as to fit snugly againstthe inner surfaces of cylinder ends and 5. When piston 15 is rotated inthe direction of the arrow in Fig. 3, the rollers 17 will be forcedoutwardly against the inner surface of the cylinder by the action of thecentrifugal force developed by rotat1on, the force with which theyengage the walls of the cylinder being, of course, a function of thespeed at which the piston rotates and the diameter thereof. Since therollers 17 fit loosely within the slots 16 they will roll on the innersurface of the cylinder and thus reduce the wear and frlctlon to aminimum.

wear of surfaces that are in movable contact.

Cylinder end 5 has a protruding portion 19 which contains the bearingsurface 13. The protruding portion 19 has a closed end 20 which has ascrew threaded opening 21 for the reception of a plug 22. By this meansthis end can be sealed air and water tight without the aid of stuflingboxes and packing. The shaft 14: must extend through end member 4 andbeyond the same in order that power may be applied to it for turning thepiston 15. End member 4; is therefore provided with a protruding portion23 of considerably greater length than member 19. this protrudingportion is provided with a bearing surface 12 and a space 24 for thereception of packing material which is held in place by means of plug25, the action of the stufiing box thus provided is relied upon to sealthe pump on this side.

The motive power is applied to a pulley masses or gear secured to theouter end of shaft 14 in a manner well understood.

The operation of my pump is as follows: The pump having been secured tosome suitable base by means of bolts passing through lugs 26 and havingbeen assembled as shown in the drawings and described above has theintake opening 9 connected by suitable piping to a liquid supply and thedischarge opening connected to the distributing system which may be a.pipe leading to a. reservoir, a hose or any other suitable means. Thepump is then rotated in the direction indicated by the arrow in Fig. 3.Due to the centrifugal force set up rollers 17 will fly outwardly untilthey come in contact with the inner curved surface of the cylindricalchamber 6, they will then act as valves and form a sealed space betweenthe piston wall 18 and the inner surface of the cylinder chamber. Uwingto the eccentrio position occupied by the rotary piston in the cylinder,the sealed chamber referred to above increases in volume as the pistonis rotated. thus producing a suction which lifts the liquid and causesit to flow into intake port 7' where it enters and fills the spacebetween the cylinder chamber and the piston surface. As the pistonrotates another roller comes into operative position relative to theintake port and as it passes the upper end 27 of port 7 a certain amountof water will be held in the space between the two rollers which nowoccupy the space between the upper ends 27 and 28 of ports 7 and 8respectively, a further rotation of piston 15 will cause the leadingroller to pass point 28 and permit the liquid to flow into outlet port8, the following roller actin as a piston to force the liquid out throngport 8. It is pointed out at this place that the distance between theupper ends of the intake and outlet ports, represented by 27 y and 28 inFig. 3, should. as a rule, never be less than the distance between theelements of rollers 17 that simultaneously engage the inner surface ofthe cylindrical chamber; if the distance is less than that pointed out,an open passage will at times exist between the intake and dischargeports which would prevent the formation of the required vacuum forstarting.

Owing to the fact that rol1ers.17 are held against the sides of thecylinder chamber by centrifugal force alone it follows that if thepressure against which the'pump is forcing the liquid should becomegreater than that which corresponds to the centrifugal force by whichthe rollers 17 are held against the cylinder'surface, then the rollerswill not move out of slots 16 and the pump will cease to function assuch, the piston 15 will however, continue to rotate quite freely in thecyllnder. The feature just pointed out is considered to be of specialimportance for the reason that should the discharge pipe become closedfor any reason, the pump will not continue to build up agreat pressurewith a final breakage of parts or burning out of the motor but willmerely cease to ,function as a pump until the pressure is reduced to apredetermined amount when it will automatically begin to function.

The maximum pressure under which the pump operates can be varied byvarying the speed of rotation or by varying the Weight of the rollers 17and for the purpose it may be advisable to make them hollow in someinstances and in other instances to make them with a lead core.

It'will be noted that the liquid does not have to make any sudden turnswhile passing through my pump but that when it enters at the intakeopening 9 it is deflected upwardly by the walls of intake port 7 andcarried across the top of the cylinder chamber 6 to the discharge port 8from whence it passes downwardly and is directed into the dischargeopening 10 by the gradually changing curvature of the passage leadingthereto.- From the above it is seen that the liquid as it passes throughmy ump makes a complete loop and that at no tlme is it subjected to anysudden changes in direction or reversals and that as a consequence thekineticenergy due to its velocity is never lost as is the case in somany pumps.

In Figs. 6, 7 and 8 I have shown my pump equipped with a rotary piston15 which differs from piston 15 in this that the slots 16 whi h areoccupied by rollers 17 are so placed that they are bisected bydiametrical ters Patent is:

planes placed 90 degrees apart. As pointed out above, such a pump isreversible without resorting to any alterations.

In the above specification the pump has been described with relation toa rotary piston .having four longitudinal slots and four rollers, but itis evident that any number of rollers can be used, I have simply usedfour for convenience in drawing and describing and not in any limitingsense.

Although my pump as described above is especially well adapted for usein connection with liquids, it is by no means limited thereto and can beused to pump other fluids.

Having now described my improved pump what I claim as my invention ordiscovery and what I desire to have protected by Let- 1. In a rotarypump having a piston chamber and a rotor mounted eccentrically therein;a ringlike casing having a circular chamber therein, at both ends;intake and discharge ports opening into' said chamber on the oppositesides thereof; intake and discharge passages connected respectively tothe intake and discharge ports, said passages being tangential to theside of said chamber and crossing within the casing, said intake passageopening on the side of the discharge port and said discharge passageopening on the side of the intake port.

2; A device in accordance with claim 1 in which the ports open into thechamber on a diagonal line.

In testimon 1 whereof I afiix my si ature. ENRY ORR JACK ON.

said chamber being open

